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 22.08.2011   Карта сайта     Language По-русски По-английски
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22.08.2011




Journal of Alloys and Compounds
Volume 509, Issue 37, 15 September 2011, Pages 9005-9009













doi:10.1016/j.jallcom.2011.06.117 | How to Cite or Link Using DOI


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Synthesis and characterization of cobalt-free Ba0.5Sr0.5Fe0.8Cu0.2O3−δ perovskite oxide cathode nanofibers


Samaneh Shahgaldia, b, Corresponding Author Contact Information, E-mail The Corresponding Author, Zahira Yaakoba, b, E-mail The Corresponding Author, Dariush Jafar Khadema, E-mail The Corresponding Author, Mojgan Ahmadrezaeia, b, E-mail The Corresponding Author and Wan Ramli Wan Dauda, E-mail The Corresponding Author





a Fuel cell Institute, National University of Malaysia, 43600, UKM, Bangi, Selangor, Malaysia


b Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia




Received 20 May 2011;


revised 20 June 2011;


accepted 30 June 2011.


Available online 7 July 2011.












Abstract



The cobalt-free perovskite-oxide, Ba0.5Sr0.5Fe0.8Cu0.2O3−δ (BSFC) is a very important cathode material for intermediate-temperature proton-conducting solid oxide fuel cells. Ba0.5Sr0.5Fe0.8Cu0.2O3−δ nanofibers were synthesized for the first time by a sol–gel electrospinning. Process wherein a combination of polyvinylpyrrolidone and acetic acid was used as the spinning aid and barium, strontium, iron and copper nitrates were used as precursors for the synthesis of BSFC nanofibers. X-ray diffraction studies on products prepared at different calcination temperatures revealed a cubic perovskite structure at 900 °C. The temperature of calcination has a direct effect on the crystallization and surface morphology of the nanofibers. High porosity, and surface area, in addition to an electrical conductivity of 69.54 S cm−1 at 600 °C demonstrate the capability of BSFC nanofibers to serve as effective cathode materials for intermediate-temperature solid oxide fuel cells.












Highlights



► Cobalt-free, perovskite oxide nanofibers were prepared by electrospinning. ► Electrospinning was chosen due to the simplicity, and cost effective. ► BSFC nanofibers have higher surface area and conductivity in compare the BSFC nanoparticles. ► High porosity of BSFC nanofibers is the other advantages. ► Such a paper proves that there is a lot of possibility to make new trustable cathode in SOFC.





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  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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